ostlund



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0. GSTLU ND'IQE A. E. MALMSTROM.

PETROLEUM STOVE.

No. 575,979. Patented Jan. 26, 1897 3 Sheets-Sheet 2.

0. bSTLUND & A. E. MALMSTROM. PETROLEUM $T0VE-v No. 515,979. PatentedJan. 26,1897.

(No Model.)

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(No Model.)

PETROLEUM STOVE.

No. 575,979; Patented Jan. 26, 1897.

. UNITED STATES PATENT. OFFICE.

CARL QSTLUND AND AXEL ELIS MALMSTRUM, OF STOOKIIOLM, SWEDEN.

PETROLEUM-STOVE.

SPECIFICATION forming part of Letters Patent No. 575,979, dated January26, 1897. Application filed June 17, 1895. Serial No. 553,044. (Nomodel.)

To all whom it may 007L00r7b:

Be it known that we, CARL OSTLUND and AXEL ELIs MALMSTRESM, subjects ofthe Kin g of Sweden and Norway, and residents of Stockholm, Sweden, haveinvented certain Improvements in Petroleum-Stoves, of which thefollowing is a specification.

This invention relates to certain improvements in wicklesspetroleum-stoves in which the petroleum is forced up from the reservoirthrough a pipe (or channel) to a burner by means of air-pressure created.in the petroleum-reservoir, and one object of the invention is to soconstruct the stove that a suitable quantity of air is retained in theupper part of the petroleum-reservoir when the latter is replenishedwith petroleum, said part of the reservoir thus forming an air-chamber.

Another object of this invention is to dispense with the pump hithertoused to produce the requisite pressure on the surface of the oil byeffecting a sufficient heating of the air inclosed in the air-chamber,and, further-- more, to avoid the leakage that is liable to occur insuch lamps or burners as hitherto made, in which the spindle of theregulating- Valve passes through a hole in the side of the lower part ofthe burner.

In order to carry out this invention, we provide-that the greater partof the petroleumreservoir shall be situated above the mouth of thesupplying-aperture in the reservoir, so that a quantity of air alwaysremains there when the petroleum is supplied, and consequently the upperpart of the reservoir is always an air-chamber. This may be obtained byproviding a tube under the supplying-aperture, said tube extendingsufficiently far down into the reservoir, or by arranging in such amanner that the petroleum cannot rise above a certain level, so that asufficient part of the reservoir must remain filled up with air. Theinclosed air is heated by the heat from the burner and thereby receivesthe pressure that is necessary to force the petroleum up to the burner.

A burner such as described in our application of March 20, 1895, No.542,509, may be used, but a burner of other construction may beemployed, provided it has a flame-spreading plate, and is constructed togive the necessary heat to the supply-pipe and to the upper part of thereservoir.

The heating of the air inclosed in the airchamber is facilitated andincreased by providing in the air-chamber a projecting disk of metal,fixed to the tube leading to the burner or to the upper part of thereservoir or to both, or wings or other projections facilicating theready transmission of the heat from the burner to the air in theair-chamber, and thus effectively contributing to this air, obtainingthe necessary pressure to force up the petroleum.

To avoid leakage, according to this invention both the regulating-valveitself and its spindle are placed inside and along the pipe leading fromthe bottom of the reservoir to the burner, and the exit aperture of theburner is so formed that it will be closed on the valve being raised.The valve is operated by moving its spindle up or down, and this can beeffected in many ways, for instance, by a screw, a lover, or inclinedplanes. The above-described arrangement of the valve makes it possibleto place the burner-opening and the axis of the petroleum-supply pipe inline, thus rendering the inside of the burner and the inside of the pipeeasily accessible by a piece of wire or other appliance for cleansingpurposes.

In the accompanying drawings several arrangements are shown by way ofexample.

The same letters represent corresponding parts in the different figures,of which Figures 1, 3, 4L, 5, and 6 are vertical sections of apetroleum-stove constructed according to this invention and providedwith difierent arrangements of valve apparatus. Fig. 2 is a plan ofFig. 1. In Fig. l lever-gearing, and in Fig. 3 inclined planes, are usedfor operating the valve, and in Figs. 4, 5,and 6 screws are shown forthe purpose.

a is the petroleum-reservoir; b, the supplypipe opening into the bottomof the reservoir through suitable side slots or openings b b.

c is the screw-cap, and e short tube extending down from thefilling-orifice into the reservoir.

d is the burner, e the flame-spreading plate, and f conducting-arms carring the spreading-plate and fixed to the supply-pipe.

The regulating-valve g is 011 a spindle h.

t' is a dish-shaped plate, of copper or other heat-conducting material,fixed within the air-chamber part of the reservoir to the pipe I) and tothe bottom of the ignition-cup 70.

In Fig. 1 the valve-spindle h is jointed to the arm lof a lever. Thefulcrum m of the lever is fixed to the bottom of the reservoir, but mayequally well be fixed at the top, if desired. From the arm n of the saidlever a rod 0 passes upwardly through a stuifing-box in the roof of thereservoir, and on its threaded end is placed a nut 19 in such a way thatit can be rotated but not moved longitudinally. On turning this nut inone direction or the other the valve will be opened or closed.

In Fig. 3 the valve-spindle h is operated by moving a rod longitudinallyto and fro. The end of the rod is provided with two inclined planes,which, on the rod being moved, act on corresponding planes in a hole inthe valvespindle and cause the latter to move up or down. In this figureis diagrammatically shown by dotted lines an arrangement for impartingthe necessary movement to the rod 9 by means of a screw and nut, as inFig. 1, in combination with a bell-crank lever.

In Figs. 4 and 5 the valve-spindle 72 is screwthreaded, in the formerfigure at the lower end, and in the other near the top, and passesthrough a corresponding fixed nut. The spindle passes out through astuffing-box s in the bottom of the pipe I) or reservoir and has anoperating-handle as, so that when the spindle is turned to the right orleft by the arm 00 the valve is opened or closed.

In Fig. 5 the heat-conducting disk 2" is shown slitted or winged.

In Fig. 6 there is an inelin ed rod tim movable lengthwise, which isscrew-threaded at the lower end and takes into a screw-threaded hole inthe valve-spindle h. On turning the rod 0" the spindle 72, will be movedup or down and at the same time a slight lateral movement will be givento the spindle.

Several modifications in the constructions shown may be adopted andother means may be used for operating the valve or its spindle, providedthe device by which the valve is operated passes through the lamp at aplace where the heat developed when the lamp is burning cannot actinjuriously on the packing round such device.

The stove is put into operation in the ordinary manner by first ignitingspirit or the like placed in the cup 70, and when this has nearly burnedoutopening the valve where upon the vapor that has been produced rushesout through the exit-aperture in the nipple and is ignited by the spiritflame. The spreading-plate e and conducting-arms fare heated, and thepipe I) is kept sufficiently warm to vaporize the oil and heat thedish-like piece or projection e' by conduction, and this piece- '5transfers the heat to the air in the air-chamber and keeps up thenecessary pressure therein. The effect of the piece 2' may be augmentedby making incisions therein, as inclicated, for instance, in Fig. 5.

e claim. as our invention 1. In a wickless petroleum-stove, thecombination of a reservoir adapted to contain petroleum in its lowerpart only and air in its upper part, a pipe opening into the bottom ofthe reservoir and having a burner at its up per part, and means forheating the air in said upper part of the reservoir, substantially asand for the purpose set forth.

2. In a wickless petroleum-stove, the eombination of a reservoir, havinga feed-tube extending down into the same to leave a closed air-chamberin the reservoir, a pipe, opening into the bottom of the reservoir andhaving a burner at its upper part, and meansfor heating the air in saidchamber, substantially as and for the purpose set forth.

3. In a wickless petroleum-stove, the combination of a reservoir, havinga feed-tube extending down into the same to leave a closed air-chamberin the reservoir, a pipe opening into the bottom of the reservoir andhaving a burner at its upper part, a heat-conducting disk or platewithin said chamber and means for heating said disk or plate,substantially as and for the purpose set forth.

4. In a wickless petroleum-stove, the com bination of a reservoiradapted to contain petroleum in its lower part only, and air in itsupper part, a pipe opening into the bottom of the reservoir and having aburner at its upper part, and a valve-spindle extending through saidpipe and out at the bottom of the reservoir, substantially as and forthe purpose set forth.

5. In a wickless petroleum-stove, the combination of a reservoiradapted'to contain petroleum in its lower part only, and air in itsupper part, a pipe opening into the bottom of the reservoir and having aburner at itsupper part, and a valve-spindle extending through said pipeand out at the bottom of the reservoir, and a nut for saidvalve-spindle, sit-uated above the reservoir, substantially as and forthe purpose set forth.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

CARL OSTLUND. n AXEL ELIS MALMSTROM. \Vitnesses:

FREDRIK L. ENQUIST, OSKAR RINGSTRoM.

